Handle.



M. W. PITNBR. HANDLE.

, 1912. .1 ,060,856. Patented May 6, 1913. A

i f i.

, mf y M MARION W. PITNER, OF CHICAGO, ILLINOIS.

HANDLE.

Specification of Letters Patent.

Patented May 6, 1913.

Application led J une 29, 1912. Serial No. 706,683.

To all 'whom it may concern Be it known that I, MARION W. PITNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Handles,- of which the following is a specification.

This invention relates to handles for the piston rods of air pumps and other tools or devices operated by hand power, and particularly to handles of that type having a central reinforcing band or sleeve, the primary object of the yinvention being to provide a novel construction of handle and sleeve and mode of connecting the same with the piston or other connecting rod, whereby the handle is rendered absolutely rigid against displacement and prevented from working loose.

A further object of the invention is to provide a handle of the character described which embodies in general the customary elements, which are constructed and combined in such manner as to mutually cooperate toward securing a strong and rigid coupling connection, whereby a handle of superior strength, durability and resisting capacity to strains is obtained without increasing the number of parts or the cost of production.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a side view of the handle shown applied to the piston rod. Fig. 2 is-a vertical longitudinal section through the same. Fig. 3 is a vertical transverse section taken centrally through the handle and sleeve. Fig. 4 is a view similar to Fig. 2, showing the handle and sleeve as combined and constructed prior to the application of the rod, the latter being disposed in position for application.

In carrying my invention into practice, I provide a handle 1, preferably made of a single piece of hard wood, said handle comprising a central portion 2 and handleends or grips 3, all integral with each other. Inclosing the central portion 2 of the handle is a substantially spherical collar or sleeve 4, formed of brass or other suitable material, and having a transverse bore or passage 5 to receive said central portion of' the handle. The bore is made of a diameter slightly exceeding the diameter of the grips 3, so that the handley may be inserted at one end through the bore and the portion 2 forced into the bore with a driving t. As shown, the part 2 of the handle and the bore are preferably longitudinally tapered, whereby the parts are vfirmly bound together. l

In practice, the central portion of the handle` and bore of the collar or sleeve are made of such relative dimensions as to require the handle to be driven into the collar by considerable force, by which the wood is compacted in the bore of the collar to a sufficient degree or in such an absolutely tight manner that any slight variations in the dimensions which may occur through contraction of the wood or expansion of the collar, will not impair the efficiency of the binding connection. The handle, inl fact, l

is driven so tightly into the collar that it would split but for the reinforcing action due to the wedging engagement of the tapered surfaces. An absolutely tight connection is thus obtained against any possibility of relative movement of the parts, while at ythe same time the part 2 of the handle is so sustained and reinforced that it cannot possibly split or break.

The lower portion or base of the collar is provided with an .internally threaded opening 6, while the top portion of the collar is provided in line therewith with a conical recess 7 communicating with the bore 5, and formed in the central portion of the handle is a threaded passage 8 which registers at its opposite ends with said opening and recess. The piston rod 9 has a threaded end l() which passes through and engages the threads of the opening 6 and passage 8 and terminates in a conical extremity 11 which tightly fits within the recess 7, by which construction the handle and collar are further bound and mechanically fastened together and the threaded end .of the rod reinforced in a simple and eective manner.

In the process of manufacturing and assembling the parts, the handle 1, made of selected and thoroughly seasoned hard Wood, is carefully turned down to an exact size and driven into the collar 4: by a powerful machine. The handle thus far comlos pleted is then placed in another machine in 2.1 10

piston rod 9, whose end portion'l() has been carefully and accurately threaded, is then firmly held in al chuckand threaded through the opening 6 and passage 8, the said threaded end of the rod thus forcing its way and cutting its oivn thread through, the` Wood, until its conical end binds against the Wall of the recess 7. By this construction, the passage 8, which is primarily of smaller diameter than the rod, is expanded and compacted, so that its fibers on which the threads are formed will have a binding engagement, in addition to the locking engagement afforded by the threads, against the surface of the rod, whereby the handle is additionally strengthened. j f It rwill be observed that-,the spherical :torni of the collar enables an opening 6 of some depth to be' made, by which a threaded engagement of sufficient length between Vthe base of the collar and rod is atforded to prevent any possibility of a tilting or canting'motion of the handle ont-he rod, and that this anchoring engagement is further promoted by having the end of the rod im* j pinge against the top of the collar and seat within the recess 7, which is also formed in a portion of the collar of suflicient thickness-3 to prevent play or motion ofthe parts under strain.4 Furthermor e, by forcing the top of the rod firmly against the top of the collar, is distended or elongated slightly` the collar in a vertical direction and its sides correspondingly contracted, tol further promote the binding engagement between the collar and handle and prevent any vpossibility of independent motion of'eitherot these parts. The binding engagement of thel threads of the passage 8 with the threaded end of the rod further prevents any tendency ot the rod to turn and become loose.

My improved handle may be employedy wherever handles of `this type are commonly used, but is especially adapted for,4

use in connection with hand-operated air pumps in which the handle is subjected tov considerable strain on account of the unequal pressure to which the handle-ends 3` are frequently subjected, as well as the con-7 stant pounding and jarring action caused by,` the piston rod bumping against the bot-' Handles of ordinary. construction are usually rendered short-l tom of the pump.

lived or work loose and become useless as a result of these strains.

it is rendered practically indestructible and- My construction, however, provides a handle which cannotv havin' a bore an inclosinv' sleeve and a rod having a direct threaded engagement with a wall of the sleeve and the bore of the handle, the wallk of said bore being expanded and compacted, whereby the threaded surfaces of the rod and handle are bound b the contractile tendency of the wall of the bore.

2. The combination with a handle, of an inclosing sleeve, and a rod having a threaded engagement with the base oi the sleeve and extending through the handle and impinging against the top of t-he sleeve.

3. The combination with a handle, of a substantially spherical inclosing sleeve, and a rod extending through and y having a threaded engagement with the handle and base of the sleeve and impinging against the top of the sleeve.

et. The combination with a sleeve having 1 a tapered bore, of a handle having a tapered portion tted in said bore, and a rod having a threaded engagement with the sleeve and inclosed portion of the handle.

5. The combination of a wooden handle having a transverse bore, an inclosing sleeve provided with an opening in its-base in line with the bore, and a rod having a threaded engagement with said Ybore and opening, the wall of the bore being expanded and compacted from` an initial diameter less than that of`V the opening and rod and formed with threads cut by the threads of the rod' on the insertion 'of the latter, whereby the threaded surfaces of the handle and rod are bound by the contractile ytendency of the wall of the bore.

G. The combination'of a sleeve, a handle vwith a driving fit in said sleeve and a rod i having an end portion in threaded engagement with the sleeve and inclosed portion of the handle.

7. The combination of a handle having a central portion and grips integral therewith, a collar about said central portion and with which the latter is engaged with a driving i'it, and a rod having a direct threaded en gagement with said collar and inclosed central portion of the handle.

8. The combination of a handle having a tapered central portion, a sleeve provided with a tapered bore into which said tapered portion of the handle is seated with a driving lit, and a rod having an end portion threaded through the base of the sleeve and into said tapered portion of the handle.

9. The combination of a sleeve having a transverse tapered bore, a wooden handle having a central portion and end grips integi'al therewith, said central portion'of the handle being tapered and engaging said tapered bore with a driving fit, and a rod threaded through the base of the sleeve and tapered portion of the handle and impinging against the top of the sleeve.

10. The combination of a sleeve having a tapered bore, a handle having a central portion and end grips integral therewith, said central portion of the handle being tapered and forced into said bore with a driving fit, and a rod having an end threaded through the base of the sleeve and into the tapered portion of the handle, the threaded surfaces ofthe rod and handle having a binding fit.

11. The combination of a sleeve provided with a passage having respectively a threaded opening and a recess in opposed walls thereof, a handle litted in said passage, and a rod having a threaded end portion engaging the threaded opening of the sleeve and passing through and in threaded engagement with the handle and terminally interlocking with said recess.

12. A handle having a tapered portion, a substantially spherical'sleeve provided with a tapered passage receiving said tapered portion of the handle, the lower wall of said sleeve being provided with a threaded opening and the upper wall of said sleeve with a recess, and a rod having a threaded end portion engaging the threaded opening in the bottom wall of the sleeve and extending through and having a threaded engagement with said tapered portion of the handle, and terminally interlocked with said recess in the top wall of the sleeve.

In testimony whereof I aix my signature in presence of two witnesses.

l MARION W. PITNER. Witnesses R. V. JONES, F. P. COCHRAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

